I have just experienced a total failure of our exchange server 2010 standard edition. I have managed to get 3 of the 4 databases in a clean state and gone through the database portability for disasters, but am not able to change the attributes to point the users to the new databases. I have gone through creating the new database and copied both log files and .edb to the new location but not able to change the attribute. I have the old databases on an external drive and made the new databases on an internal 1 TB drive. I have tried the below but get no confirmation:

>Get-Mailbox -Database MB02 | Set-Mailbox -Database FMB02

I have also tried to create a new system from scratch and connected to AD, but now am unable to move the user mailboxes to the new database cerated.

Any advise welcome

M

Without being entirely sure what you have exactly done and what current state your Exchange Organization is in the command to 'configuration only' move mailboxes in Exchange 2013 is what you have said.

Specifically:

Get-Mailbox -Database <SourceDatabase> |where {$_.ObjectClass -NotMatch '(SystemAttendantMailbox|ExOleDbSystemMailbox)'}| Set-Mailbox -Database <TargetDatabase>
Please let us know the exact steps you have done and if the previous databases are still in AD configuration. You may want to also use the -Verbose switch if you are
saying the command is completing without information.
"Move a Mailbox Database Using Database Portability" http://technet.microsoft.com/en-us/library/dd876926%28v=exchg.150%29.aspx